java -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/seq2.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 13:38:56,099 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 13:38:56,101 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 13:38:56,119 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 13:38:56,120 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 13:38:56,121 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 13:38:56,124 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 13:38:56,126 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 13:38:56,128 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 13:38:56,130 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 13:38:56,131 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 13:38:56,131 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 13:38:56,132 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 13:38:56,137 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 13:38:56,137 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 13:38:56,138 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 13:38:56,140 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 13:38:56,142 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 13:38:56,143 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 13:38:56,144 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 13:38:56,145 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 13:38:56,148 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 13:38:56,148 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 13:38:56,149 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 13:38:56,149 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 13:38:56,150 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 13:38:56,151 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 13:38:56,152 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 13:38:56,153 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 13:38:56,153 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 13:38:56,154 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 13:38:56,155 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 13:38:56,155 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 13:38:56,156 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 13:38:56,156 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 13:38:56,157 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 13:38:56,172 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 13:38:56,172 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 13:38:56,173 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 13:38:56,173 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 13:38:56,174 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 13:38:56,175 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 13:38:56,178 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 13:38:56,178 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 13:38:56,178 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 13:38:56,179 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 13:38:56,179 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 13:38:56,179 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 13:38:56,179 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 13:38:56,179 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 13:38:56,179 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 13:38:56,180 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 13:38:56,180 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 13:38:56,181 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 13:38:56,182 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 13:38:56,238 INFO ]: Repository-Root is: /tmp [2018-06-18 13:38:56,256 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 13:38:56,262 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 13:38:56,264 INFO ]: Initializing SmtParser... [2018-06-18 13:38:56,264 INFO ]: SmtParser initialized [2018-06-18 13:38:56,264 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/seq2.c.smt2 [2018-06-18 13:38:56,266 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-18 13:38:56,366 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/seq2.c.smt2 unknown [2018-06-18 13:38:56,671 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/seq2.c.smt2 [2018-06-18 13:38:56,676 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 13:38:56,684 INFO ]: Walking toolchain with 4 elements. [2018-06-18 13:38:56,685 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 13:38:56,685 INFO ]: Initializing ChcToBoogie... [2018-06-18 13:38:56,685 INFO ]: ChcToBoogie initialized [2018-06-18 13:38:56,691 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 01:38:56" (1/1) ... [2018-06-18 13:38:56,784 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:38:56 Unit [2018-06-18 13:38:56,784 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 13:38:56,785 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 13:38:56,785 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 13:38:56,785 INFO ]: Boogie Preprocessor initialized [2018-06-18 13:38:56,812 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:38:56" (1/1) ... [2018-06-18 13:38:56,812 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:38:56" (1/1) ... [2018-06-18 13:38:56,831 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:38:56" (1/1) ... [2018-06-18 13:38:56,831 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:38:56" (1/1) ... [2018-06-18 13:38:56,871 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:38:56" (1/1) ... [2018-06-18 13:38:56,873 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:38:56" (1/1) ... [2018-06-18 13:38:56,875 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:38:56" (1/1) ... [2018-06-18 13:38:56,887 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 13:38:56,888 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 13:38:56,888 INFO ]: Initializing RCFGBuilder... [2018-06-18 13:38:56,888 INFO ]: RCFGBuilder initialized [2018-06-18 13:38:56,889 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:38:56" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 13:38:56,955 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 13:38:56,955 INFO ]: Found specification of procedure False [2018-06-18 13:38:56,956 INFO ]: Found implementation of procedure False [2018-06-18 13:38:56,956 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 13:38:56,956 INFO ]: Found specification of procedure state [2018-06-18 13:38:56,956 INFO ]: Found implementation of procedure state [2018-06-18 13:38:56,956 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 13:38:56,956 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 13:38:56,956 INFO ]: Found implementation of procedure Ultimate.START [2018-06-18 13:38:57,345 INFO ]: Using library mode [2018-06-18 13:38:57,345 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 01:38:57 BoogieIcfgContainer [2018-06-18 13:38:57,345 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 13:38:57,357 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 13:38:57,357 INFO ]: Initializing TraceAbstraction... [2018-06-18 13:38:57,360 INFO ]: TraceAbstraction initialized [2018-06-18 13:38:57,360 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 01:38:56" (1/3) ... [2018-06-18 13:38:57,361 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3207f1b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 01:38:57, skipping insertion in model container [2018-06-18 13:38:57,361 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:38:56" (2/3) ... [2018-06-18 13:38:57,362 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3207f1b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 01:38:57, skipping insertion in model container [2018-06-18 13:38:57,362 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 01:38:57" (3/3) ... [2018-06-18 13:38:57,364 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 13:38:57,373 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 13:38:57,383 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 13:38:57,430 INFO ]: Using default assertion order modulation [2018-06-18 13:38:57,431 INFO ]: Interprodecural is true [2018-06-18 13:38:57,431 INFO ]: Hoare is false [2018-06-18 13:38:57,431 INFO ]: Compute interpolants for FPandBP [2018-06-18 13:38:57,431 INFO ]: Backedges is TWOTRACK [2018-06-18 13:38:57,431 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 13:38:57,431 INFO ]: Difference is false [2018-06-18 13:38:57,431 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 13:38:57,431 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 13:38:57,455 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 13:38:57,475 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 13:38:57,475 INFO ]: Found error trace [2018-06-18 13:38:57,476 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:38:57,476 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:38:57,482 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-18 13:38:57,485 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:38:57,485 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:38:57,541 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:38:57,541 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:38:57,541 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:38:57,579 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:38:57,588 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:38:57,701 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 13:38:57,703 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 13:38:57,704 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 13:38:57,706 INFO ]: Interpolant automaton has 4 states [2018-06-18 13:38:57,718 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 13:38:57,718 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 13:38:57,721 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 13:38:57,843 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:38:57,844 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 13:38:57,845 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 13:38:57,846 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 13:38:57,847 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:38:57,862 INFO ]: With dead ends: 13 [2018-06-18 13:38:57,862 INFO ]: Without dead ends: 13 [2018-06-18 13:38:57,866 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 13:38:57,889 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 13:38:57,946 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 13:38:57,948 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 13:38:57,949 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 13:38:57,950 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 13:38:57,951 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:38:57,951 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 13:38:57,951 INFO ]: Interpolant automaton has 4 states. [2018-06-18 13:38:57,951 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 13:38:57,953 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 13:38:57,953 INFO ]: Found error trace [2018-06-18 13:38:57,953 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:38:57,954 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:38:57,954 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-18 13:38:57,954 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:38:57,954 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:38:57,955 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:38:57,955 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:38:57,955 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:38:58,042 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:38:58,043 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:38:58,455 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 13:38:58,455 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:38:58,455 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 13:38:58,468 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:38:58,536 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:38:58,554 INFO ]: Computing forward predicates... [2018-06-18 13:38:59,226 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 13:38:59,276 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:38:59,276 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-18 13:38:59,279 INFO ]: Interpolant automaton has 9 states [2018-06-18 13:38:59,280 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-18 13:38:59,280 INFO ]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-06-18 13:38:59,280 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-18 13:38:59,638 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:38:59,638 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 13:38:59,643 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 13:38:59,644 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-18 13:38:59,644 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:38:59,644 INFO ]: With dead ends: 15 [2018-06-18 13:38:59,644 INFO ]: Without dead ends: 15 [2018-06-18 13:38:59,646 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-06-18 13:38:59,646 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 13:38:59,649 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 13:38:59,650 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 13:38:59,650 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 13:38:59,650 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 13:38:59,651 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:38:59,651 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 13:38:59,651 INFO ]: Interpolant automaton has 9 states. [2018-06-18 13:38:59,651 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 13:38:59,651 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 13:38:59,651 INFO ]: Found error trace [2018-06-18 13:38:59,652 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:38:59,652 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:38:59,652 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-18 13:38:59,652 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:38:59,652 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:38:59,660 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:38:59,660 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:38:59,660 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:38:59,777 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:38:59,778 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:39:00,138 WARN ]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-18 13:39:00,351 WARN ]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-18 13:39:00,832 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 13:39:00,852 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:39:00,852 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 13:39:00,859 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 13:39:00,917 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 13:39:00,917 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:39:00,921 INFO ]: Computing forward predicates... [2018-06-18 13:39:01,406 WARN ]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-18 13:39:01,844 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 13:39:01,866 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:39:01,866 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-18 13:39:01,866 INFO ]: Interpolant automaton has 11 states [2018-06-18 13:39:01,866 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-18 13:39:01,867 INFO ]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-06-18 13:39:01,867 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-18 13:39:02,018 WARN ]: Spent 101.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2018-06-18 13:39:02,255 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2018-06-18 13:39:02,326 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:39:02,326 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 13:39:02,327 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 13:39:02,327 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-18 13:39:02,327 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:39:02,327 INFO ]: With dead ends: 17 [2018-06-18 13:39:02,328 INFO ]: Without dead ends: 17 [2018-06-18 13:39:02,328 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-06-18 13:39:02,328 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 13:39:02,334 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 13:39:02,334 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 13:39:02,334 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 13:39:02,334 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-18 13:39:02,334 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:39:02,334 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 13:39:02,335 INFO ]: Interpolant automaton has 11 states. [2018-06-18 13:39:02,335 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 13:39:02,335 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 13:39:02,335 INFO ]: Found error trace [2018-06-18 13:39:02,335 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:39:02,335 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:39:02,336 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-18 13:39:02,336 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:39:02,336 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:39:02,336 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:39:02,336 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:39:02,336 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:39:02,381 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:39:02,382 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:39:02,765 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 13:39:02,765 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:39:02,765 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 13:39:02,782 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 13:39:02,876 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-18 13:39:02,876 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:39:02,881 INFO ]: Computing forward predicates... [2018-06-18 13:39:03,071 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 13:39:03,092 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:39:03,092 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-06-18 13:39:03,092 INFO ]: Interpolant automaton has 10 states [2018-06-18 13:39:03,092 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-18 13:39:03,092 INFO ]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-06-18 13:39:03,092 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 10 states. [2018-06-18 13:39:03,454 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:39:03,454 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-18 13:39:03,455 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-18 13:39:03,455 INFO ]: Start accepts. Automaton has 10 states. Word has length 21 [2018-06-18 13:39:03,455 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:39:03,455 INFO ]: With dead ends: 19 [2018-06-18 13:39:03,455 INFO ]: Without dead ends: 19 [2018-06-18 13:39:03,456 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2018-06-18 13:39:03,456 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-18 13:39:03,459 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-18 13:39:03,459 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-18 13:39:03,459 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-18 13:39:03,460 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-18 13:39:03,460 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:39:03,460 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-18 13:39:03,460 INFO ]: Interpolant automaton has 10 states. [2018-06-18 13:39:03,460 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-18 13:39:03,460 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-18 13:39:03,460 INFO ]: Found error trace [2018-06-18 13:39:03,461 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:39:03,461 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:39:03,461 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-18 13:39:03,461 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:39:03,461 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:39:03,462 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:39:03,462 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:39:03,462 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:39:03,523 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:39:03,523 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:39:03,855 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 13:39:03,855 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:39:03,855 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 13:39:03,862 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-18 13:39:03,925 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-18 13:39:03,925 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:39:03,930 INFO ]: Computing forward predicates... [2018-06-18 13:39:04,763 WARN ]: Spent 372.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2018-06-18 13:39:04,958 WARN ]: Spent 166.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2018-06-18 13:39:05,136 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 13:39:05,163 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:39:05,163 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2018-06-18 13:39:05,163 INFO ]: Interpolant automaton has 16 states [2018-06-18 13:39:05,163 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-18 13:39:05,163 INFO ]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2018-06-18 13:39:05,163 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 16 states. [2018-06-18 13:39:05,754 WARN ]: Spent 554.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2018-06-18 13:39:05,953 WARN ]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2018-06-18 13:39:06,174 WARN ]: Spent 173.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2018-06-18 13:39:06,373 WARN ]: Spent 180.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2018-06-18 13:39:06,400 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:39:06,400 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-18 13:39:06,406 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-18 13:39:06,406 INFO ]: Start accepts. Automaton has 16 states. Word has length 25 [2018-06-18 13:39:06,406 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:39:06,407 INFO ]: With dead ends: 21 [2018-06-18 13:39:06,407 INFO ]: Without dead ends: 21 [2018-06-18 13:39:06,407 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2018-06-18 13:39:06,407 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-18 13:39:06,416 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-18 13:39:06,416 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-18 13:39:06,416 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-18 13:39:06,416 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-18 13:39:06,417 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:39:06,417 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-18 13:39:06,417 INFO ]: Interpolant automaton has 16 states. [2018-06-18 13:39:06,417 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-18 13:39:06,417 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-18 13:39:06,417 INFO ]: Found error trace [2018-06-18 13:39:06,417 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:39:06,418 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:39:06,418 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-18 13:39:06,418 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:39:06,418 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:39:06,419 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:39:06,419 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:39:06,419 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:39:06,503 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:39:06,504 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:39:06,800 WARN ]: Spent 125.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 6 [2018-06-18 13:39:07,077 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-18 13:39:07,077 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:39:07,077 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 13:39:07,084 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-18 13:39:07,144 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-18 13:39:07,144 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:39:07,149 INFO ]: Computing forward predicates... [2018-06-18 13:39:07,606 WARN ]: Spent 398.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2018-06-18 13:39:08,070 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-18 13:39:08,092 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:39:08,092 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2018-06-18 13:39:08,092 INFO ]: Interpolant automaton has 19 states [2018-06-18 13:39:08,092 INFO ]: Constructing interpolant automaton starting with 19 interpolants. [2018-06-18 13:39:08,092 INFO ]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2018-06-18 13:39:08,093 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 19 states. [2018-06-18 13:39:08,630 WARN ]: Spent 495.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2018-06-18 13:39:08,779 WARN ]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 24 [2018-06-18 13:39:09,002 WARN ]: Spent 202.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 29 [2018-06-18 13:39:09,268 WARN ]: Spent 244.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 30 [2018-06-18 13:39:09,701 WARN ]: Spent 397.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2018-06-18 13:39:10,339 WARN ]: Spent 607.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2018-06-18 13:39:10,407 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:39:10,407 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-18 13:39:10,407 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-18 13:39:10,407 INFO ]: Start accepts. Automaton has 19 states. Word has length 29 [2018-06-18 13:39:10,407 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:39:10,408 INFO ]: With dead ends: 23 [2018-06-18 13:39:10,408 INFO ]: Without dead ends: 23 [2018-06-18 13:39:10,409 INFO ]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2018-06-18 13:39:10,409 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-18 13:39:10,413 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-18 13:39:10,414 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-18 13:39:10,414 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-18 13:39:10,414 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-18 13:39:10,414 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:39:10,414 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-18 13:39:10,414 INFO ]: Interpolant automaton has 19 states. [2018-06-18 13:39:10,414 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-18 13:39:10,415 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-18 13:39:10,415 INFO ]: Found error trace [2018-06-18 13:39:10,415 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:39:10,415 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:39:10,415 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 6 times [2018-06-18 13:39:10,415 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:39:10,415 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:39:10,416 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:39:10,416 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:39:10,416 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:39:10,550 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:39:10,550 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:39:11,440 WARN ]: Spent 750.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2018-06-18 13:39:11,681 WARN ]: Spent 190.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2018-06-18 13:39:11,809 WARN ]: Spent 116.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2018-06-18 13:39:12,156 WARN ]: Spent 140.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2018-06-18 13:39:12,505 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-18 13:39:12,505 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:39:12,505 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 13:39:12,520 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-18 13:39:12,599 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-18 13:39:12,599 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:39:12,605 INFO ]: Computing forward predicates... [2018-06-18 13:39:14,421 WARN ]: Spent 1.31 s on a formula simplification. DAG size of input: 74 DAG size of output: 33 [2018-06-18 13:39:15,401 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-18 13:39:15,431 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:39:15,431 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 20 [2018-06-18 13:39:15,432 INFO ]: Interpolant automaton has 20 states [2018-06-18 13:39:15,432 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-18 13:39:15,432 INFO ]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-06-18 13:39:15,432 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 20 states. [2018-06-18 13:39:16,298 WARN ]: Spent 806.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 74 [2018-06-18 13:39:16,606 WARN ]: Spent 157.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 22 [2018-06-18 13:39:16,755 WARN ]: Spent 112.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 25 [2018-06-18 13:39:16,938 WARN ]: Spent 154.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 31 [2018-06-18 13:39:17,275 WARN ]: Spent 305.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 36 [2018-06-18 13:39:17,655 WARN ]: Spent 324.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 36 [2018-06-18 13:39:18,350 WARN ]: Spent 662.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 72 [2018-06-18 13:39:18,379 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:39:18,379 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-18 13:39:18,379 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-18 13:39:18,380 INFO ]: Start accepts. Automaton has 20 states. Word has length 33 [2018-06-18 13:39:18,380 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:39:18,380 INFO ]: With dead ends: 25 [2018-06-18 13:39:18,380 INFO ]: Without dead ends: 25 [2018-06-18 13:39:18,381 INFO ]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2018-06-18 13:39:18,381 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-18 13:39:18,384 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-18 13:39:18,384 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-18 13:39:18,385 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-18 13:39:18,385 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-18 13:39:18,385 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:39:18,386 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-18 13:39:18,386 INFO ]: Interpolant automaton has 20 states. [2018-06-18 13:39:18,386 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-18 13:39:18,386 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-18 13:39:18,386 INFO ]: Found error trace [2018-06-18 13:39:18,387 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:39:18,387 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:39:18,387 INFO ]: Analyzing trace with hash -1494134477, now seen corresponding path program 7 times [2018-06-18 13:39:18,387 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:39:18,387 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:39:18,387 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:39:18,387 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:39:18,387 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:39:18,612 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:39:18,613 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:39:19,155 WARN ]: Spent 340.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 11 [2018-06-18 13:39:19,337 WARN ]: Spent 176.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2018-06-18 13:39:19,973 WARN ]: Spent 557.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2018-06-18 13:39:20,236 WARN ]: Spent 247.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2018-06-18 13:39:20,401 WARN ]: Spent 142.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2018-06-18 13:39:20,555 WARN ]: Spent 139.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2018-06-18 13:39:21,331 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-18 13:39:21,331 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:39:21,331 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 13:39:21,337 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:39:21,423 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:39:21,430 INFO ]: Computing forward predicates... [2018-06-18 13:39:21,641 WARN ]: Spent 151.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 25 [2018-06-18 13:39:22,086 WARN ]: Spent 393.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2018-06-18 13:39:22,286 WARN ]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2018-06-18 13:39:22,602 WARN ]: Spent 157.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2018-06-18 13:39:23,950 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-18 13:39:23,970 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:39:23,970 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2018-06-18 13:39:23,970 INFO ]: Interpolant automaton has 26 states [2018-06-18 13:39:23,971 INFO ]: Constructing interpolant automaton starting with 26 interpolants. [2018-06-18 13:39:23,971 INFO ]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2018-06-18 13:39:23,971 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 26 states. [2018-06-18 13:39:25,259 WARN ]: Spent 1.23 s on a formula simplification. DAG size of input: 131 DAG size of output: 107 [2018-06-18 13:39:25,785 WARN ]: Spent 446.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 38 [2018-06-18 13:39:26,214 WARN ]: Spent 392.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 31 [2018-06-18 13:39:26,669 WARN ]: Spent 418.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 50 [2018-06-18 13:39:27,278 WARN ]: Spent 567.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 52 [2018-06-18 13:39:28,012 WARN ]: Spent 688.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 59 [2018-06-18 13:39:29,138 WARN ]: Spent 1.06 s on a formula simplification. DAG size of input: 138 DAG size of output: 71 [2018-06-18 13:39:29,734 WARN ]: Spent 533.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 62 [2018-06-18 13:39:29,777 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:39:29,777 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-18 13:39:29,779 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-18 13:39:29,779 INFO ]: Start accepts. Automaton has 26 states. Word has length 37 [2018-06-18 13:39:29,779 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:39:29,780 INFO ]: With dead ends: 27 [2018-06-18 13:39:29,780 INFO ]: Without dead ends: 27 [2018-06-18 13:39:29,781 INFO ]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2018-06-18 13:39:29,781 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-18 13:39:29,784 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-18 13:39:29,784 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-18 13:39:29,785 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-18 13:39:29,785 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 37 [2018-06-18 13:39:29,785 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:39:29,785 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-18 13:39:29,785 INFO ]: Interpolant automaton has 26 states. [2018-06-18 13:39:29,785 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-18 13:39:29,786 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-18 13:39:29,786 INFO ]: Found error trace [2018-06-18 13:39:29,786 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:39:29,786 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:39:29,787 INFO ]: Analyzing trace with hash 1618126293, now seen corresponding path program 8 times [2018-06-18 13:39:29,787 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:39:29,787 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:39:29,787 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:39:29,787 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:39:29,787 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:39:29,934 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:39:29,935 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:39:30,730 WARN ]: Spent 647.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2018-06-18 13:39:30,887 WARN ]: Spent 131.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2018-06-18 13:39:31,278 WARN ]: Spent 360.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2018-06-18 13:39:31,579 WARN ]: Spent 215.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2018-06-18 13:39:31,813 WARN ]: Spent 124.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2018-06-18 13:39:32,585 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-18 13:39:32,585 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:39:32,585 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 13:39:32,591 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 13:39:32,688 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 13:39:32,689 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:39:32,696 INFO ]: Computing forward predicates... [2018-06-18 13:39:33,744 WARN ]: Spent 480.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 34 [2018-06-18 13:39:34,134 WARN ]: Spent 247.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2018-06-18 13:39:34,432 WARN ]: Spent 234.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2018-06-18 13:39:34,616 WARN ]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2018-06-18 13:39:34,808 WARN ]: Spent 132.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2018-06-18 13:39:37,589 WARN ]: Spent 164.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2018-06-18 13:39:37,662 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-18 13:39:37,683 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:39:37,683 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2018-06-18 13:39:37,683 INFO ]: Interpolant automaton has 32 states [2018-06-18 13:39:37,683 INFO ]: Constructing interpolant automaton starting with 32 interpolants. [2018-06-18 13:39:37,683 INFO ]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2018-06-18 13:39:37,684 INFO ]: Start difference. First operand 27 states and 28 transitions. Second operand 32 states. [2018-06-18 13:39:38,837 WARN ]: Spent 1.06 s on a formula simplification. DAG size of input: 198 DAG size of output: 122 [2018-06-18 13:39:39,190 WARN ]: Spent 249.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 32 [2018-06-18 13:39:39,595 WARN ]: Spent 353.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 44 [2018-06-18 13:39:40,125 WARN ]: Spent 421.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 52 [2018-06-18 13:39:40,780 WARN ]: Spent 602.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 59 [2018-06-18 13:39:41,365 WARN ]: Spent 527.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 56 [2018-06-18 13:39:41,954 WARN ]: Spent 526.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 53 [2018-06-18 13:39:42,460 WARN ]: Spent 447.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 54 [2018-06-18 13:39:43,079 WARN ]: Spent 560.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 76 [2018-06-18 13:39:43,141 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:39:43,142 INFO ]: Finished difference Result 29 states and 30 transitions. [2018-06-18 13:39:43,142 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-18 13:39:43,142 INFO ]: Start accepts. Automaton has 32 states. Word has length 41 [2018-06-18 13:39:43,142 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:39:43,143 INFO ]: With dead ends: 29 [2018-06-18 13:39:43,143 INFO ]: Without dead ends: 29 [2018-06-18 13:39:43,144 INFO ]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2018-06-18 13:39:43,144 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-18 13:39:43,150 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-06-18 13:39:43,150 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-18 13:39:43,151 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-06-18 13:39:43,151 INFO ]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 41 [2018-06-18 13:39:43,151 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:39:43,151 INFO ]: Abstraction has 29 states and 30 transitions. [2018-06-18 13:39:43,151 INFO ]: Interpolant automaton has 32 states. [2018-06-18 13:39:43,151 INFO ]: Start isEmpty. Operand 29 states and 30 transitions. [2018-06-18 13:39:43,152 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-18 13:39:43,152 INFO ]: Found error trace [2018-06-18 13:39:43,152 INFO ]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:39:43,152 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:39:43,153 INFO ]: Analyzing trace with hash 996918775, now seen corresponding path program 9 times [2018-06-18 13:39:43,153 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:39:43,153 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:39:43,153 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:39:43,153 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:39:43,153 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:39:43,303 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:39:43,307 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:39:43,848 WARN ]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2018-06-18 13:39:43,964 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2018-06-18 13:39:44,856 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-18 13:39:44,856 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:39:44,856 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 13:39:44,863 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 13:39:44,997 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-06-18 13:39:44,997 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:39:45,007 INFO ]: Computing forward predicates... [2018-06-18 13:39:45,849 WARN ]: Spent 733.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2018-06-18 13:39:47,530 WARN ]: Spent 1.44 s on a formula simplification. DAG size of input: 170 DAG size of output: 77 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown